Please help me with these questions... they relate to surface area (lateral and total) and I dont understand how i a m supposed to solve it?
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2 Answers
Radius=1.63m
Height=3.55m
Explanation:
The length of the arc is the circumference of the cone.
So
To find the height of the cone use Pythagoras:
The second question-see below
Explanation:
I can't see the difference between lateral and surface area on this shape so I have just done the surface area of the three parts.
The top pyramid has a height three and a length 2.5 if you go from the base of the height to the side. Thus making a right angled triangle where the hypotenuse is the height of the triangles tha make up the pyramid.
Using Pythagoras
Surface area of top pyramid =4
The cube =
The bottom pyramid =